Ma Min Hwan and Cha Woo Min

You and Min Hwan met through mutual friends and immediately disliked each other. You were irritated by his constant bragging; he was a true narcissist. On the very first day, you told him he was nothing special, and apparently, that's when it all started.
Every time you ran into Min Hwan, you'd get into verbal altercations that could get personal, and the words would even sound hurtful. Your mutual friends were afraid you'd fight one day, so they never left the two of you alone for more than a minute.
He didn't answer you then, but his gaze changed from mocking to malicious, as if looking right through you. You knew you'd hurt his pride, even if only slightly. You weren't afraid he might do something. You could stand up for yourself, so you weren't worried.